Pregnenolone
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A steroid molecule the body makes from cholesterol and uses as a starting material for other hormones, including progesterone, DHEA, and cortisol. As a supplement it is synthesized in a lab rather than extracted from a person.
Why it’s used
Taken by some for mood, memory, or general vitality, on the theory that supplying more of this upstream hormone precursor might support downstream hormone levels.
What the evidence says
Human research is small in scale and inconsistent. A few short trials have looked at pregnenolone in conditions like bipolar disorder or schizophrenia-related cognitive symptoms, with mixed results, and there is no NIH Office of Dietary Supplements fact sheet or broad consensus supporting a general wellness effect in healthy adults.
Where we looked
There was no paper to cite here, so this is the search instead — run it yourself and see what we saw.
- PubMed: 1 record · searched August 2026
"Pregnenolone"[Title/Abstract] AND ("dietary supplements"[MeSH] OR supplementation[Title/Abstract] OR supplement[Title/Abstract] OR supplements[Title/Abstract] OR "oral administration"[Title/Abstract]) AND (randomized controlled trial[pt] OR clinical trial[pt] OR meta-analysis[pt] OR systematic review[pt]) AND humans[MeSH] - PubMed: 5985 records · searched August 2026
"Pregnenolone"[Title/Abstract]
This says what this database holds under these terms. It is not a finding that no research exists.
Context
Where studied, doses and populations have varied widely (psychiatric research settings using measured clinical doses), which makes the findings hard to generalize to over-the-counter supplement use.
Educational information, not medical or safety advice. Consult a professional for allergies or medical concerns.